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From:   Zi Yan <zi.yan@sent.com>
To:     linux-mm@kvack.org
Cc:     David Hildenbrand <david@redhat.com>,
        Matthew Wilcox <willy@infradead.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        John Hubbard <jhubbard@nvidia.com>,
        Yang Shi <shy828301@gmail.com>,
        David Rientjes <rientjes@google.com>,
        James Houghton <jthoughton@google.com>,
        Mike Rapoport <rppt@kernel.org>, linux-kernel@vger.kernel.org
Subject: [RFC PATCH v2 08/12] mm/page_reporting: set page_reporting_order to -1 to prevent it running
Date:   Thu, 11 Aug 2022 19:16:39 -0400
Message-Id: <20220811231643.1012912-9-zi.yan@sent.com>
In-Reply-To: <20220811231643.1012912-1-zi.yan@sent.com>
References: <20220811231643.1012912-1-zi.yan@sent.com>
Reply-To: Zi Yan <ziy@nvidia.com>
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From: Zi Yan <ziy@nvidia.com>

page_reporting_order was initialized to MAX_ORDER to prevent it running
before its value is overwritten. Use -1 instead to remove the
dependency on MAX_ORDER.

Signed-off-by: Zi Yan <ziy@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
---
 mm/page_reporting.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mm/page_reporting.c b/mm/page_reporting.c
index b48d6ad82998..001438f3dbeb 100644
--- a/mm/page_reporting.c
+++ b/mm/page_reporting.c
@@ -11,7 +11,11 @@
 #include "page_reporting.h"
 #include "internal.h"
=20
-unsigned int page_reporting_order =3D MAX_PHYS_CONTIG_ORDER + 1;
+/*
+ * Set page_reporting_order to (unsigned int)-1 to prevent it running unti=
l the
+ * value is being overwritten
+ */
+unsigned int page_reporting_order =3D (unsigned int)-1;
 module_param(page_reporting_order, uint, 0644);
 MODULE_PARM_DESC(page_reporting_order, "Set page reporting order");
=20
--=20
2.35.1